Process for the post-chlorination of vinyl chloride polymers

Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Mixing of two or more solid polymers; mixing of solid...

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5253316, C08F 822

Patent

active

043861890

ABSTRACT:
A simple and practical method for making post-chlorinated polymers based upon vinyl chloride is provided based upon conducting the chlorination reaction on a granular polymer suspended in aqueous hydrochloric acid in the presence of a stoichiometric excess of liquid chlorine and in the absence of any significant amount or organic solvent/swelling agent. Use of photo-radiation techniques is also avoided since the reaction is activated by means of a minor fraction of a percent based upon weight of said polymer of an organic peroxy compound which decomposes to form free radicals at the temperatures involved in the reaction.

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